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BugLink: https://bugs.launchpad.net/bugs/2072617 [ Upstream commit 89875151fccdd024d571aa884ea97a0128b968b6 ] When request_irq() fails, error path calls vp_del_vqs(). There, as vq is present in the list, free_irq() is called for the same vector. That causes following splat: [ 0.414355] Trying to free already-free IRQ 27 [ 0.414403] WARNING: CPU: 1 PID: 1 at kernel/irq/manage.c:1899 free_irq+0x1a1/0x2d0 [ 0.414510] Modules linked in: [ 0.414540] CPU: 1 PID: 1 Comm: swapper/0 Not tainted 6.9.0-rc4+ #27 [ 0.414540] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.3-1.fc39 04/01/2014 [ 0.414540] RIP: 0010:free_irq+0x1a1/0x2d0 [ 0.414540] Code: 1e 00 48 83 c4 08 48 89 e8 5b 5d 41 5c 41 5d 41 5e 41 5f c3 cc cc cc cc 90 8b 74 24 04 48 c7 c7 98 80 6c b1 e8 00 c9 f7 ff 90 <0f> 0b 90 90 48 89 ee 4c 89 ef e8 e0 20 b8 00 49 8b 47 40 48 8b 40 [ 0.414540] RSP: 0000:ffffb71480013ae0 EFLAGS: 00010086 [ 0.414540] RAX: 0000000000000000 RBX: ffffa099c2722000 RCX: 0000000000000000 [ 0.414540] RDX: 0000000000000000 RSI: ffffb71480013998 RDI: 0000000000000001 [ 0.414540] RBP: 0000000000000246 R08: 00000000ffffdfff R09: 0000000000000001 [ 0.414540] R10: 00000000ffffdfff R11: ffffffffb18729c0 R12: ffffa099c1c91760 [ 0.414540] R13: ffffa099c1c916a4 R14: ffffa099c1d2f200 R15: ffffa099c1c91600 [ 0.414540] FS: 0000000000000000(0000) GS:ffffa099fec40000(0000) knlGS:0000000000000000 [ 0.414540] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 0.414540] CR2: 0000000000000000 CR3: 0000000008e3e001 CR4: 0000000000370ef0 [ 0.414540] Call Trace: [ 0.414540] <TASK> [ 0.414540] ? __warn+0x80/0x120 [ 0.414540] ? free_irq+0x1a1/0x2d0 [ 0.414540] ? report_bug+0x164/0x190 [ 0.414540] ? handle_bug+0x3b/0x70 [ 0.414540] ? exc_invalid_op+0x17/0x70 [ 0.414540] ? asm_exc_invalid_op+0x1a/0x20 [ 0.414540] ? free_irq+0x1a1/0x2d0 [ 0.414540] vp_del_vqs+0xc1/0x220 [ 0.414540] vp_find_vqs_msix+0x305/0x470 [ 0.414540] vp_find_vqs+0x3e/0x1a0 [ 0.414540] vp_modern_find_vqs+0x1b/0x70 [ 0.414540] init_vqs+0x387/0x600 [ 0.414540] virtnet_probe+0x50a/0xc80 [ 0.414540] virtio_dev_probe+0x1e0/0x2b0 [ 0.414540] really_probe+0xc0/0x2c0 [ 0.414540] ? __pfx___driver_attach+0x10/0x10 [ 0.414540] __driver_probe_device+0x73/0x120 [ 0.414540] driver_probe_device+0x1f/0xe0 [ 0.414540] __driver_attach+0x88/0x180 [ 0.414540] bus_for_each_dev+0x85/0xd0 [ 0.414540] bus_add_driver+0xec/0x1f0 [ 0.414540] driver_register+0x59/0x100 [ 0.414540] ? __pfx_virtio_net_driver_init+0x10/0x10 [ 0.414540] virtio_net_driver_init+0x90/0xb0 [ 0.414540] do_one_initcall+0x58/0x230 [ 0.414540] kernel_init_freeable+0x1a3/0x2d0 [ 0.414540] ? __pfx_kernel_init+0x10/0x10 [ 0.414540] kernel_init+0x1a/0x1c0 [ 0.414540] ret_from_fork+0x31/0x50 [ 0.414540] ? __pfx_kernel_init+0x10/0x10 [ 0.414540] ret_from_fork_asm+0x1a/0x30 [ 0.414540] </TASK> Fix this by calling deleting the current vq when request_irq() fails. Fixes: 0b0f9dc ("Revert "virtio_pci: use shared interrupts for virtqueues"") Signed-off-by: Jiri Pirko <[email protected]> Message-Id: <[email protected]> Signed-off-by: Michael S. Tsirkin <[email protected]> Signed-off-by: Sasha Levin <[email protected]> Signed-off-by: Portia Stephens <[email protected]> Signed-off-by: Stefan Bader <[email protected]>
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BugLink: https://bugs.launchpad.net/bugs/2089272 [ Upstream commit 60f07e2 ] We use uprobe in aarch64_be, which we found the tracee task would exit due to SIGILL when we enable the uprobe trace. We can see the replace inst from uprobe is not correct in aarch big-endian. As in Armv8-A, instruction fetches are always treated as little-endian, we should treat the UPROBE_SWBP_INSN as little-endian。 The test case is as following。 bash-4.4# ./mqueue_test_aarchbe 1 1 2 1 10 > /dev/null & bash-4.4# cd /sys/kernel/debug/tracing/ bash-4.4# echo 'p:test /mqueue_test_aarchbe:0xc30 %x0 %x1' > uprobe_events bash-4.4# echo 1 > events/uprobes/enable bash-4.4# bash-4.4# ps PID TTY TIME CMD 140 ? 00:00:01 bash 237 ? 00:00:00 ps [1]+ Illegal instruction ./mqueue_test_aarchbe 1 1 2 1 100 > /dev/null which we debug use gdb as following: bash-4.4# gdb attach 155 (gdb) disassemble send Dump of assembler code for function send: 0x0000000000400c30 <+0>: .inst 0xa00020d4 ; undefined 0x0000000000400c34 <+4>: mov x29, sp 0x0000000000400c38 <+8>: str w0, [sp, #28] 0x0000000000400c3c <+12>: strb w1, [sp, #27] 0x0000000000400c40 <+16>: str xzr, [sp, #40] 0x0000000000400c44 <+20>: str xzr, [sp, #48] 0x0000000000400c48 <+24>: add x0, sp, #0x1b 0x0000000000400c4c <+28>: mov w3, #0x0 // #0 0x0000000000400c50 <+32>: mov x2, #0x1 // #1 0x0000000000400c54 <+36>: mov x1, x0 0x0000000000400c58 <+40>: ldr w0, [sp, #28] 0x0000000000400c5c <+44>: bl 0x405e10 <mq_send> 0x0000000000400c60 <+48>: str w0, [sp, #60] 0x0000000000400c64 <+52>: ldr w0, [sp, #60] 0x0000000000400c68 <+56>: ldp x29, x30, [sp], #64 0x0000000000400c6c <+60>: ret End of assembler dump. (gdb) info b No breakpoints or watchpoints. (gdb) c Continuing. Program received signal SIGILL, Illegal instruction. 0x0000000000400c30 in send () (gdb) x/10x 0x400c30 0x400c30 <send>: 0xd42000a0 0xfd030091 0xe01f00b9 0xe16f0039 0x400c40 <send+16>: 0xff1700f9 0xff1b00f9 0xe06f0091 0x03008052 0x400c50 <send+32>: 0x220080d2 0xe10300aa (gdb) disassemble 0x400c30 Dump of assembler code for function send: => 0x0000000000400c30 <+0>: .inst 0xa00020d4 ; undefined 0x0000000000400c34 <+4>: mov x29, sp 0x0000000000400c38 <+8>: str w0, [sp, #28] 0x0000000000400c3c <+12>: strb w1, [sp, #27] 0x0000000000400c40 <+16>: str xzr, [sp, #40] Signed-off-by: junhua huang <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Will Deacon <[email protected]> Stable-dep-of: 13f8f1e05f1d ("arm64: probes: Fix uprobes for big-endian kernels") Signed-off-by: Sasha Levin <[email protected]> Signed-off-by: Manuel Diewald <[email protected]> Signed-off-by: Mehmet Basaran <[email protected]>
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